<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>3.1 CSS3制作透明背景层</title>
    <style>
#background{
    margin: 100px auto;
    width: 800px;
    height: 291px;
    background-image: url('./img/003.png');
    position: relative;
}
        #content{
             position: absolute;
            width: 400px;
            height: 200px;
            background-color: #fff;
            opacity: 0.8;
            top: 45px;
            left:200px;
            border-radius: 10px;
            padding: 10px;
            text-align: center;
            -webkit-box-shadow: 3px 3px 5px #888;
            box-shadow: 3px 3px 5px #888;
        }
    </style>
</head>
<body>
  <div id="background">
       <div id="content">
            hello every!im pander<br>
            hello every!im pander<br>
            hello every!im pander<br>
            hello every!im pander<br>
            hello every!im pander<br>
            hello every!im pander<br>
       </div>
  </div>
</body>
</html>